Signaling system



May 17, 1932. w. R. G. BAKER S-IGNALING SYSTEM Filed Nov. 6, 1923 by MMA JQ/12.

His ftor'ney.

Patented May 17, 1932l UNITED STATES WALTER R. G. BAKER, oF SCHENECTADY, NRW YORK, AssIeNoR. 'ro

COMPANY, A CORPORATION or NRW YORK ,PATENT oFllciajf,A

GENERAL ELEcmRIc sIGNALING 'SYSTEM Application led November My present invention relates to signaling systems and more particularly to systems in which high frequency signaling currents are transmitted over high potential electri- '5 cal transmission lines.

In systems of the type here involved it has been proposed to impress the high frequency signaling currents upon the power conductors by suspending a coupling wir-e j parallel to the power conductors and between overcome by so locating the coupling wire that it is surrounded by the transmission conductors. It will then be shielded to such an extent that most of the high frequency energy will be transferred to the transmission conductors and there will be little radiation.

In carrying my invention into effect the coupling wire may preferably be located symmetrically with respect to the transmission conductors. In the case of a single threephase transmission line, for example, the coupling wire should be located at equal distances from all three of the transmission conductors. When arranged in this way the capacity between the coupling wire and earth will also be less than when the coupling wire is beneath the line conductors. The potentials induced in the coupling wire from the transmission conductors will also in this case be substantially neutralized.

My invention will best be understood by reference to the following description taken in connection with the accompanying drawing in which I have indicated diagrammatically one way in which my invention may be carried into eEect.

I hav-e indicated in the drawing a transmission system comprising two three-phase transmission lines made up of conductors l to 6, inclusive. The transmission conductors are supported by towers of conventional e, 1923. serii No. 673,191.,

form of which only two, 7 vand y8 are indi# cated. The. coupling wire .9, which. isenclosed within aI space bounded by.y the trans'- mission `conductors, is suspended between the towers 7 and 8,v and insulated therefrom by A strain insulators, 10. A lead ll connects thc couplingwire 9 with earthanda signaling apparatus l2 is'connected tothe earth lead Il by the usual' couplingtransformer 13'.

A r'It will be noted thatthe coupling wire is surrounded by thev transmission conductors, being located `entirely within thespacie. enclosed by planes passing through adjacent conductors on the four sides of the coupling wire.` It is;V also .synametri'callyl located with respect. to the transmission conductors, `being equidistant from' conductors 1,53, et, andw,

and from conductors: 2 and .5. The arrangement described may be used either `forftran'smission or reception; thatv isy the apparatus '12 may be either aI transmittingor a receiving apparatus;

Y WhilezI liayefsiiown and describedon'ly one embodiment of my' invention,r it.` will' `be Tap;

parent that many modifications of my in'lf vention .may be made `without, departing fromthescope: thereof as set; forth: vinf'tlie appended claimsi 1. 'V I, -i .Y

met I claimfasinewand desire to secure 'by Lettersl l13a-tentv of the United States, is:-

l. The combination in ahiglr frequency transm-ttingsystem ofV a high potential electrical transmission line comprising three or more conductors supported above the earth, a coupling conductor extending parallel to the conductors of said transmission line and symmetrically arranged with respect thereto, a high frequency apparatus for energizing s'aid coupling conductor and a connection between said coupling conductorand said high frequency apparatus.

2. The combination in a high frequency transmitting system of a high potential electrical transmission line supported above the earth, said transmission line comprising more than two conductors arranged in intersectying planes, a coupling conductor extending parallel to the conductors of said transmission line and located entirely within a space enclosed by planes passing through adjacent conductors, high frequency apparatus for energizing said coupling conductor and a connection between said coupling wire and said high frequency apparatus.

l 3. The combination in a high frequency transmitting system of an electric transmission line supported above the earth and comprising a plurality of electrical conductors arranged to enclose a substantially rectangular space, a coupling conductor extending parallel to the conductors of said transmission line and located within the space enclosed by said conductors, high frequency apparatus for energizing said coupling conductor and a connection between said coupling conductor and said high frequency apparatus.

4. The combination in a high frequency transmitting system of an electrical transmission line supported above the earth, said zo transmission line comprising more than two conductors arranged in intersecting planes, a coupling conductor extending parallel to the conductors of said transmission line and disposed Within a space bounded by the conductors of the transmission system, high frequency apparatus for energizing said coupling conductor and a connection between said coupling conductor and said high frequency apparatus.

ao 5. The combination in a high frequency transmitting system of an electric transmissiony line comprising a plurality of conductors supported above the earth, a coupling conductor extending parallel to the conduc- 36 tors of said transmission lines, certain ofthe conductors of thetransmission lines being disposed between the coupling conductor and the earth and in such proximity to said coupling conductor and to each other that there i 40 is little or no radiation between the coupling conductor and the earth, high frequency apparatus for energizing said coupling conductor and a connection between said high frequency apparatus and said coupling conductor. In witness whereof, I have hereunto set my hand this 5th day of November, 1923.

WALTER R. G. BAKER. 

